Measuring 18O and D for Commercial Apples and Oranges A quick screening method of using stable isotopes to distinguish the true origin and/or composition of natural food and beverage products Keywords: Material: Apples, oranges, apple juice, orange juice, food, cereal, fruit, fruit juice, vegetables, wine, olive oil, honey, food stuffs, petfood, Process: Stable isotopes, 18O and D, delta-18O, delta-D Picarro L2120-I 液態(tài)水和水汽同位素分析儀 Picarro 13C+D CM-CRDS碳氫同位素分析儀